Stadium seat cushion



FIG. 1 is an elevated perspective view of my new design for a stadium seat cushion;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevated front end view thereof;

FIG. 4 is an elevated back end view thereof;

FIG. 5 is an elevated right side view thereof, the opposite side being a mirror image; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a stadium seat cushion, as shown and described. 